At&t Dsl Error Nad-3304 Who this is for With the ubiquity of streaming services, cloud storage, and (slowly) increasing broadband speeds. and it doesn’t come with Windows software. DSL Failed to Connect (Message ID: NAD-3304) – Microsoft. – Original title: Broadband Link – Error I've been receiving this NAD-3304 message quite frequently, and it has become bothersome. It started